https://111qqz.com/en/tags/%E4%BA%8C%E9%A1%B9%E5%BC%8F%E5%AE%9A%E7%90%86/Recent content in 二项式定理 on 111qqz's blogHugo -- gohugo.ioen© 2015-2026 111qqzWed, 02 Mar 2016 13:41:51 +0000https://111qqz.com/en/post/acm-icpc/2016/2016-03-02-cf451e/Wed, 02 Mar 2016 13:41:51 +0000https://111qqz.com/en/post/acm-icpc/2016/2016-03-02-cf451e/<p><a href="http://codeforces.com/problemset/problem/451/E" target="_blank" rel="noreferrer">http://codeforces.com/problemset/problem/451/E</a> 题意;有n个花坛，要选s支花，每个花坛有f[i]支花，同一个花坛的花颜色相同，不同花坛的花颜色不同，问说可以有多少种组合。 思路：典型的母函数&hellip;然而s有点大，根据泰勒展开什么的&hellip;先转一下官方题解。</p>